Also, much of the material is very, shall we say, 'political' in nature. If you have an unrequited interest in anarchism, feminism, socialism, or radicalism, the Zine Library is a great place to get a pro-bono education.
I went ahead and downloaded the ABCs of Anarchy by Brian Heagney (and no, he did not chaotically rearrange the staid, traditional order of the alphabet. 'A' is still at the top, lording it over the average K's and P's).
Heagney's illustrations are certainly a thing to be seen. Especially note "'B' is for Black Bloc.'" It is a graphic full of solemn faces and dark crosshatching. A Black Bloc, by the way, is meant to be a mass gathering representative of solidarity. Because when you think anarchist, you should think unity.
Other Letters:
K is for Kabouter (Dutch word for Gnome. Name of famous Dutch anarchists)
R is for Rewilding (Going back to nature)
S is for Squat
T is for Train-Hopping
U is for Un-School (Learning that is unsanctioned by the local academic infrastructure)
And, as for the thorny letter X: it is for Xylography, a particularly radical form of making prints that makes use woodcutting.
And now I know my ABCs.